<template>
    <div>
        <input type= "button" value="+1" @click="addNum" />
        {{num}}
        <input type= "button" value="-1" @click="subNum" />
    </div>
</template>

<script>
export default {
    data() {
        return { num: 0 };
    },
    methods: {
        addNum(){
            this.num++;
        },
        subNum(){
            this.num--;
        },
    },
};
</script>
<style>
</style>